If you are one of the fortunate people in MA served by a natural gas utility, you probably saved a bundle this winter compared with your neighbors who burn oil, propane, or the truly unfortunate who heat with electric baseboard heaters. If you are like most people, you get your bill, it sits in a pile for a week or two, and then you pay it without scrutinizing it. If you pay online, you almost certainly don't read your bill. You may not realize it, but if you heat with natural gas you are participating in a deregulated marketplace.

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